6.5% 效率的钙钛矿量子点敏化太阳能电池。

6.5% efficient perovskite quantum-dot-sensitized solar cell.

机构信息

School of Chemical Engineering and Department of Energy Science, Sungkyunkwan University, Suwon 440-746, Korea.

出版信息

Nanoscale. 2011 Oct 5;3(10):4088-93. doi: 10.1039/c1nr10867k. Epub 2011 Sep 7.

Abstract

Highly efficient quantum-dot-sensitized solar cell is fabricated using ca. 2-3 nm sized perovskite (CH(3)NH(3))PbI(3) nanocrystal. Spin-coating of the equimolar mixture of CH(3)NH(3)I and PbI(2) in γ-butyrolactone solution (perovskite precursor solution) leads to (CH(3)NH(3))PbI(3) quantum dots (QDs) on nanocrystalline TiO(2) surface. By electrochemical junction with iodide/iodine based redox electrolyte, perovskite QD-sensitized 3.6 μm-thick TiO(2) film shows maximum external quantum efficiency (EQE) of 78.6% at 530 nm and solar-to-electrical conversion efficiency of 6.54% at AM 1.5G 1 sun intensity (100 mW cm(-2)), which is by far the highest efficiency among the reported inorganic quantum dot sensitizers.

摘要

采用尺寸约为 2-3nm 的钙钛矿（CH(3)NH(3))PbI(3)纳米晶，制备了高效量子点敏化太阳能电池。在γ-丁内酯溶液（钙钛矿前驱体溶液）中旋涂等摩尔比的 CH(3)NH(3)I 和 PbI(2)，在纳米晶 TiO(2)表面形成（CH(3)NH(3))PbI(3)量子点（QDs）。通过与碘/碘基氧化还原电解质的电化学结，钙钛矿量子点敏化 3.6μm 厚的 TiO(2)薄膜在 530nm 处表现出最大外量子效率（EQE）为 78.6%，在 AM 1.5G 1 太阳强度（100mWcm(-2))下的太阳能到电的转换效率为 6.54%，这是迄今为止报道的无机量子点敏化剂中效率最高的。